Line Part Atttributes in DSNO (ASN) file - source?

A requirement for Honda ASN/856 is to map the item unit weight to an EDI field (MEA03), however, the unit weight does not get generated in the DSNO file, just the Container Weight.  The container weight must be calculated as quantity shipped x unit weight from the item master, and the container weight as well.  I see that there are 15 Line Part Attributes in the DSNO interface file in rows 7460 thru 7490 as well as a context value.  I recall on an inbound EDI (850 I think) that we had mapped a value to one of these line